Julius begtrup



l. BEGTRUP. GRINDING MACHINE. APPLICATION FILED MAR. 21. 1913.

Patented Aug. 1, 1916.

"-" day:

INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

JULIUS BEGTRUP, 0F JERSEY CITY, NEW JERSEY, ASSIGNOR TO GOLDSCHMIDT THERMIT COMPANY, OF NEW YORK. N. Y., A CORPORATION OF NEW YORK.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Aug. 1, 1916.

To all whom it may concern:

Be it known that I, J ULIUS BEGTRUP, citizen of the United States, and resident of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Grinding- Machines, of which the following is a specification.

This invention relates to a grinding machine, and especially to a rail-grinder for dressing the surfaces of rails, etc., to eliminate or reduce irregularities in such surfaces.

It has been found that worn spots formed, for example, in the treads of track-rails of railroads as a result of the passage of railway vehicles and the consequent pounding of the rails, are frequently spaced fairly uniformly because of a correspondingly regular pounding action of the wheels, and that this feature must be'taken into account in the operation of apparatus for grinding down such surfaces to a new horizontal or substantially horizontal level. In a companion application of John H. Deppeler, Serial No. 757,095 filed March 27, 1913, there is disclosed a grinding machine especially adapted for rail-grinding purposes, in which an extended support is provided for the purpose of reducing vertical motion of the grinding means due to irregularities in the surface to be dressed; that applica tion disclosing for this purpose one or more extended supports, each having a plurality of separated points of contact with the surface to be dressed, and each preferably including a roller-truck with rollers spaced at considerable distances apart, for the pur pose of making such contact with the sur face to be ground.

The extended support of the present application is distinguished from that of the aforesaid application mainly by reason of the fact thatthough the extended support used may, in most respects, be of any type suitable for the purpose, it is one in which the points of support for the grinding machine are differentially spaced in order that some one or more of such points may remain substantially at the high level f and in contact with the tread of the rail, even though another or other such contact points may be opposite a depression or depressions in the surface of such tread. It has been found in practice that when these contact points, which are preferably the points of contact of rollers with the tread of a rail, are differentially spaced, they do not follow depressions in the tread as do rollers which are spaced at equal distances apart, for the reason that there is not the same tendency for substantially all of the rollers of a series to sink into uniformly spaced depressions that there is in the case of equidistant rollers. In the preferred construction these differentially spaced rollers are employed in my improved machine, as in that of the aforesaid application, in connection with auxiliary supporting means or roller-trucks on which the main truck and grinding means of the machine may be supported for movement along the surface or surfaces to be dressed; and I also prefer to make use of means similar to that disclosed in said application for driving the differentially spaced rollers of the roller-trucks from the main truck of the grinding apparatus.

Other features of the invention not hereinbefore referred to will be hereinafter described and claimed and are illustrated in the accompanying drawings, in which,

Figure 1 is an end elevation of a grinding machine embodying the present invention, said machine being shown in operative relation with track-rails (in section); Fig. 2 is a side elevation of the same, showing the grinding means in position for dressing a surface; Fig. 3 is an enlarged sectional side elevation of a portion of said machine showing one of the roller-trucks of the aux- .iliary supporting means and a wheel supported thereby upon a track-rail, and Fig. 4: is an end elevation and transverse section of the same.

Similar characters designate like parts in all the figures of the drawings.

My present invention may be embodied in, or combined with, any suitable grinding machine. It is illustrated in connection with. a ime of rail-grinder well known in the art, and most of the elements of the machine shown are or may be those ordinarily found in such rail-grinders.

The machine illustrated has a main frame, designated generally by 2, having at its opposite ends axles 3 and 4, suitably mounted in bearings and carrying supporting wheels, such as 5 and 6, these being the main elements of what will be herein termed the main truck of the present grinding machine. Suitably mounted upon the frame 2 is the grinding apparatus. In the construction shown, which is intended specifically for the dressing of the surfaces of two parallel track-rails of a railroad, two separate grinding means are illustrated. Each comprises a suitable motor (shown as an electric motor) from which movement is imparted to a grinding wheel suitably mounted in bearings. Here the two motors are designated respectively by 7 and 8, and transmit the movements of their shafts, as by means of belts 9 and 10. to grinding Wheels, one of which is shown at 11. Provision may be made for shifting the grinding wheels cross wise of the main truck and also vertically thereof. Here the grinding wheel 11 is shown as mounted at the lower end of a bracket, 12, which is adjustable up and down on a vertical slide, 13, as by means of a hand-wheel, 14, having suitable connections for imparting vertical movement to the grinding wheel; and transverse movement may be imparted to the bracket 12 by mounting its vertical slide 13 on a crossslide, 15, a transverse adjusting screw being shown at 16 for controlling such crosswise movement. In addition to these parts there will also preferably be suitable provision for moving the main truck a short distance along the rails when it is desired to locate it with accuracy in position for grinding a given portion of a rail surface. The means illustrated for this purpose comprises a vertieal shaft, 17, having at the lower end thereof a worm, 18, meshing with a wormwheel, 19, in fixed relation with one of the wheels 5 of the main truck. The vertical shaft 17 has at its upper end a hand-wheel, 20, by means of which it may be turned and the main truck correspondingly moved a short distance to locate the machine in the exact position desired. In order that the truck may be readily moved along the rails at other times, the parts 17, 18 and 20 just described are preferably so mounted that they may be swung out of operative relation with the worm-gear 19, all of them being illustrated as pivoted at 21 for this purpose. All of the parts just described are or may be those found in rail-grinding machines known to the art.

Though the extended support, which con stitutes the principal feature of my improved grinding machine, may be a part of the grinding machine proper, it is preferably embodied, as in the aforesaid application, in an element separate from the main truck of the machine, in order that the grinding machine proper may be used either alone or in connection with auxiliary supporting means. When the auxiliary supporting means is not in place the main truck and the grinding means may be employed to dress certain portions of the rail surfaces. The auxiliary supporting means, however, will be placed in position whenever the irregularities in the surfaces to be dressed, adjacent the points of support of the main truck, are such as to bring about an undesirable vertical movement of the grinding wheel 11, as, for example, when the main truck is moved back and forth in the operation of grinding the surface to be dressed to a horizontal plane. The extended support or relati ely long contact surface for sup porting the grinding machine is shown as embodied in one or more relatively long roller-trucks. The construction illustrated is one in which a series of such trucks carry the wheels of the main truck, one rollertruck being employed for each of the wheels 5 and 6 shown. Each roller-truck comprises a frame, 22, having rollers, such as 23 and 24, mounted therein, with their axes in the same horizontal plane. The rollers 23 also have, in this case, flanges similar to those of the wheels 5 and 6, and for a similar purpose. A single roller-truck suflicient for the purpose of providing at one side of the grinding wheel a relatively long or extended supporting surface, and such a support at one side of the grinding wheel may be used to advantage in connection with a single point of support at the other side of the grinding wheel located in a common plane with all of the points of support of such roller-truck. Preferably, however, there will be a series of points of support at each side of the grinding wheel, the contact points of the two series being generally in a common plane, in order that the grinding wheel may be maintained in a substantially constant relation vertically to any desired horizontal plane. When two series of differentially spaced rollers, such as 28 and 24, at opposite sides of the grinding means are employed, two or more rollers of each series will remain on a high level of the tread and a substantially constant vertical relation be tween the grinding means and the tread of the rail assured. Owing to the fact that, even when there is a series of regularly spaced depressions in the rail tread adjacent each of the roller-trucks shown, one depression for each roller of the truck, the differentially spaced rollers of that truck do not all enter such depressions, the usual relative up and down movement between the main truck and the rail is substantially eliminated at both ends of the apparatus, and the grinding means is maintained in the desired substantially uniform relation to any given horizontal plane of the surface being ground. It will of course be understood, and it isshown clearly in Fig. 1, that at least four roller-trucks of the character described will be employed when the machine is one adapted for traveling upon, and simultaneously dressing, the surfaces of a pair of rails, such for example, as are shown at 0. Any desired additional number of trucks may be used.

In grinding machines as ordinarily constructed, and particularly rail-grinders, it is desirable not to change in any way the construction or mode of operation of satisfactory existing machines. In rail-grinders especially it is desirable that the general type of machine-embodying a. main truck and flanged wheels mounted therein and adaptcd to support the truck and grinding means, and to travel on track-rails-be retained unchanged, as such a machine as ordinarily constructed is an entirely satisfactory means for grinding many portions of the treads of track-rails. For this reason also it is preferable to embody the differentially spaced points of support in auxiliary supporting means which may be readily and wholly removed from the grinding machine proper.

The construction shown is one in which each roller-truck is adapted to receive and support one of the wheels 5 and (3, elevating it sulliciently above its normal position to permit the rollers of the roller-truck to travel upon the tread of the rail. I lere the wheels 5 and 6 rest directly upon the rollers 24, which are not flanged, and the flanged rollers and the rollers 2% take the place of the main wheels 5 and (i, as lateral locating devices, the wheels 24 taking the place, in this case, of the wheels 5 as traction-wheels.

In the present case, as in the aforesaid application, means are provided for applying power to one or more of the rollertrucks from the main truck, for the purpose of propelling said roller-trucks and with them the main truck and the grinding means. The devices hereinbefore described, to wit, the worm-gearing 18-19 operated by the handle 20 and the shaft 17, constitute in this case a means for driving the roller-truck and the main truck, through power applied through the engaging surfaces of the wheels 5 and the rollers 24-. It will be seen from the drawings that by merely placing each roller-truck in its proper position under and in contact with the proper wheel of the main truck, the main truck and all of its parts, including the grinding means, will be supported by means wholly separate from them and yet that there will be a constant driving connection for moving or propelling all of these parts along the track, so long as the roller-trucks are in place.

In order that all of the rollers or wheels of the roller-trucks cooperative with the wheels 5 may be positively driven, the rollers or wheels and 2 t of the trucks cooperating with said wheels are shown as having shafts, 25, and 26, with sprocket-wheels, 227 and .28, around which pass sprocketc'hains, E29, by means of which the positively driven rollers 24 also positively drive the rollers 23 of these trucks.

\Vhat I claim is 2 1. In a grinding machine, the combination with grinding means, of an extended support embodying a series of more than two differentially spaced points of support ly ing in a common plane.

2. In a grinding machine, the combination with grinding means, of an extended support embodying a point of support at one side of the grinding point and a series of more than two differentially spaced points of support at the opposite side of said grinding point and in the plane of said first point of support.

3. In a grinding machine, the combination with grinding means, of an extended support embodying two series of rollers with their contact points in a common plane, one series at one side and the other at the other side of the grinding point, the rollers of uch series being more than two in number and differentially spaced.

4. In a grinding machine, the combination with grinding means, of a wheeled main truck for supporting said grinding means for operation, and auxiliary supporting means constructed to receive and support said main truck and embodying a series of more than two differentially spaced points of support for the grinding machine lying in a common plane.

5. In a grinding machine, the combination with grinding means, of a wheeled main truck for SHPPOI'tiIIg said grinding means for operation, and auxiliary supporting means constructed to receive and support said main truck and embodying a series of more than two ditl'erentially spaced rollers having their points of contact with the surface to be ground in a common plane and on some of which rollers the wheels of said main truck rest.

6. In a grinding machine, the combination with grinding means, of a wheeled main truck for supporting said grinding means for operation, an auxiliary roller-truck constructed to receive and support said main truck and embodying a series of more than two differentially spaced rollers having rollers of said roller-truck.

their points of contact With the surface to Signed at Jersey City in the county of be ground in a common plane and means Hudson and State of New Jersey this thiri) carried by said main truck for turning the teenth day of March A. D. 1913 7. A truck for grinding machines, em- JULIUS BEGThUI' bodying a series of more than two differen- \Vitnesses:

tinny-spaced points of support lying in a S. ROWLAND,

common plane. EDITH I. HILL.

Copies of this patent may be obtained for five cents each, by addressin g the "Commissioner of Patents, Washington, D. C. 

